Usually, we don’t know how important something is ________ we lose it.

A. or B. until C. if D. after

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：新目標(biāo)八年級(jí)下冊(cè)Unit 9 Have you ever been to a museum 同步練習(xí)及答案 題型：單項(xiàng)填空

Do you have any problem _________foreigners?

A. talk with B. talk to C. to talking about D. talking with

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：湖北省隨州市2017年九年級(jí)英語(yǔ)中考模擬試卷 題型：單項(xiàng)填空

The pilot saw the soldier soccer at this time yesterday.

A. play B. to play C. playing D. played

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：山東省臨沂市臨沂經(jīng)濟(jì)開(kāi)發(fā)區(qū)2017屆九年級(jí)中考一模（期中）英語(yǔ)試卷 題型：閱讀理解

根據(jù)短文內(nèi)容，判斷下列句子正誤。正確的用“A”表示，不正確的用“B”表示。

Indian scientists have designed a new device (設(shè)備) that

they hope will solve one of the biggest problems with the use

of solar energy. They call the device a solar tree. Solar trees

have metal “branches” (分枝). Each branch holds a solar panel (太陽(yáng)能電池板). These panels have flat surfaces that collect energy from the sun and turn it into electricity.

       Daljit Singh Bedi is the chief (首席的) scientist at the Council of Scientific and Industrial Research in India. Bedi says the shape of the solar trees makes it possible to fit more solar panels in a space than traditional systems do. This means less land would be needed to produce solar energy. “It takes about four square meters of space to produce energy. However, 400 square meters of space would be required in the past to produce the same energy,” he says.

       Scientists believe the energy that a solar tree collects will be enough to power five homes. The solar tree will make it easier to provide solar energy for homes in cities. The trees will also take less space from farmers in the countryside. And that way people are able to use 10 to 15 percent more energy.

       Amit Kumar is a senior engineer of the Energy and Resources Institute in New Delhi. He says that it is still not clear how useful these new developments in solar power technology are. “Only when we put those trees on a large scale (規(guī)模) will we be able to get that answer,” he says.

1.Indian scientists have solved a big problem with the use of solar energy.

2.Solar trees can save land and produce more energy.

3.Not every scientist agrees that solar trees are useful at present.

4.Solar trees are widely used in India.

5.The passage mainly introduces how to use solar energy.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：山東省臨沂市臨沂經(jīng)濟(jì)開(kāi)發(fā)區(qū)2017屆九年級(jí)中考一模（期中）英語(yǔ)試卷 題型：單項(xiàng)填空

Excuse me, sir. You ________ open the door before the car stops.

A. needn’t B. don’t have to C. may not D. mustn’t

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：遼寧省營(yíng)口市2017屆九年級(jí)下學(xué)期第一次模擬考試英語(yǔ)試卷 題型：書面表達(dá)

最初Wechat（微信）只是一種社交工具，現(xiàn)在以其強(qiáng)大豐富的功能，方便了人們的生活而得到人們的喜愛(ài)。請(qǐng)你說(shuō)說(shuō)Wechat的功能的理解。

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：遼寧省營(yíng)口市2017屆九年級(jí)下學(xué)期第一次模擬考試英語(yǔ)試卷 題型：補(bǔ)全對(duì)話

(B)在下面對(duì)話的空白處填入適當(dāng)?shù)脑捳Z(yǔ)（話語(yǔ)可以是句子、短語(yǔ)或詞） 使對(duì)話完整。

（共10分，每小題2分）

A: Excuse me, where is Judy?

B:    1.She wants to visit the Great Wall.

A: Really?2.there?

B: She went there last Monday.

A: 3.

B: No, she’s never been there before.

A:4.did she go there with? Her friends?

B: No, she went there with her parents.

A: When will she be back?

B: She’ll be back at the end of this month.

A: Thank you.

B:5.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：遼寧省營(yíng)口市2017屆九年級(jí)下學(xué)期第一次模擬考試英語(yǔ)試卷 題型：單項(xiàng)填空

－It's difficult for village children to cross the river to school.

－I think a bridge _________ over the river.

A. should be built B. will build

C. is built D. was built

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：牛津譯林版英語(yǔ)九年級(jí)下 Unit1 測(cè)試卷（word版附答案） 題型：單項(xiàng)填空

The story is very interesting. Don’t stop. to tell it, please.

A. Go over B. Go up C. Go on D. Go around

查看答案和解析>>

同步練習(xí)冊(cè)答案